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January 20, 2021 Service bulletin

This technical bulletin provides a procedure to program the reductant fluid module if found the

Chevrolet technical service bulletin 21NA007 for 2020-2021 Chevrolet Silverado 1500, 2020-2021 GMC Sierra 1500 and 2020-2021 Chevrolet Silverado 2500 and others.

Bulletin number
21NA007
Component
Engine and engine cooling: exhaust system: emission control
Summary
This technical bulletin provides a procedure to program the reductant fluid module if found the cause of the customers concern.

Owners of these vehicles have filed 1,399 complaints in the engine category.

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